code: def load_jupyter_server_extension(nbapp):
      """Load the nbserver extension"""
  
      nbapp.log.info("Loading IPython parallel extension")
      webapp = nbapp.web_app
      webapp.settings["cluster_manager"] = ClusterManager(parent=nbapp)
  
      base_url = webapp.settings["base_url"]
      webapp.add_handlers(
          ".*$",
          [
              (ujoin(base_url, pat), handler)
              for pat, handler in default_handlers
          ],
      )
  
file_path: ipyparallel/ipyparallel/nbextension/handlers.py
imports: import json
  import os
  from tornado import web
  from ..cluster import ClusterManager
  from ..util import abbreviate_profile_dir
  from .base import get_api_handler
label_desc: Use image node_id 1 for calling a global function with example usage: load_jupyter_server_extension(nbapp) without return types